<template>
  <div class='home-category' @mouseleave="currentId=null">
    <ul class="menu">
      <li :class='{active: currentId===item.id}' @mouseenter="currentId=item.id" v-for="item in $store.getters['cate/leftCates']" :key="item.id">
        <RouterLink to="/">{{item.name}}</RouterLink>
        <!-- 二级分类 -->
        <template v-if='item.children'>
          <RouterLink v-for='tag in item.children' :key='tag.id' to="/">
            {{tag.name}}
          </RouterLink>
        </template>
        <!-- 显示骨架屏 -->
        <template v-else>
          <XtxSkeleton width="60px" height="18px" style="margin-right:5px" bg="rgba(255,255,255,0.2)" />
          <XtxSkeleton width="50px" height="18px" bg="rgba(255,255,255,0.2)" />
        </template>
      </li>
      <!-- 品牌条目 -->
      <li :class='{active: currentId==="brandId"}' @mouseenter="currentId='brandId'">
        <RouterLink to="/">{{brand.name}}</RouterLink>
        <RouterLink to="/">{{brand.children[0].name}}</RouterLink>
      </li>
    </ul>
    <!-- 弹层 -->
    <div class="layer">
      <h4>分类推荐 <small>根据您的购买或浏览记录推荐</small></h4>
      <!-- 商品数据 -->
      <ul>
        <li v-for="item in goods" :key="item.id">
          <RouterLink to="/">
            <img :src="item.picture" alt="">
            <div class="info">
              <p class="name ellipsis-2">{{item.name}}</p>
              <p class="desc ellipsis">{{item.desc}}</p>
              <p class="price"><i>¥</i>{{item.price}}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
      <!-- 品牌数据 -->
      <ul v-if='currentId==="brandId"'>
        <li class="brand" v-for="item in brand.brands" :key="item.id">
          <RouterLink to="/">
            <img :src="item.picture" alt="">
            <div class="info">
              <p class="place"><i class="iconfont icon-dingwei"></i>{{item.place}}</p>
              <p class="name ellipsis">{{item.nameEn}}</p>
              <p class="desc ellipsis-2">{{item.name}}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
import { ref, computed, reactive } from 'vue'
import { useStore } from 'vuex'
import { findBrand } from '@/api/home.js'

export default {
  name: 'HomeCategory',
  setup () {
    // 记录当前选中的一级分类的id
    const currentId = ref(null)
    const store = useStore()

    // 根据store中的list数据和当前选中的一级分类id就算此时的右侧弹窗的商品信息
    const goods = computed(() => {
      const cate = store.state.cate.list.find(item => item.id === currentId.value)
      return cate ? cate.goods : []
    })

    // 品牌数据
    const brand = reactive({
      id: 'brandId',
      name: '品牌',
      children: [{ id: 'brandItemId', name: '品牌推荐' }],
      brands: []
    })

    // 调用接口获取品牌列表数据
    findBrand().then(ret => {
      if (ret.result) {
        brand.brands = ret.result
      }
    })

    return { currentId, goods, brand }
  }
}
</script>

<style scoped lang='less'>
.home-category {
  width: 250px;
  height: 500px;
  background: rgba(0, 0, 0, 0.8);
  position: relative;
  z-index: 99;
  .menu {
    li {
      padding-left: 40px;
      height: 50px;
      line-height: 50px;
      &.active {
        background: @xtxColor;
      }
      a {
        margin-right: 4px;
        color: #fff;
        &:first-child {
          font-size: 16px;
        }
      }
    }
  }
  .layer {
    width: 990px;
    height: 500px;
    background: rgba(255, 255, 255, 0.8);
    position: absolute;
    left: 250px;
    top: 0;
    display: none;
    padding: 0 15px;
    h4 {
      font-size: 20px;
      font-weight: normal;
      line-height: 80px;
      small {
        font-size: 16px;
        color: #666;
      }
    }
    ul {
      display: flex;
      flex-wrap: wrap;
      li {
        width: 310px;
        height: 120px;
        margin-right: 15px;
        margin-bottom: 15px;
        border: 1px solid #eee;
        border-radius: 4px;
        background: #fff;
        &:nth-child(3n) {
          margin-right: 0;
        }
        a {
          display: flex;
          width: 100%;
          height: 100%;
          align-items: center;
          padding: 10px;
          &:hover {
            background: #e3f9f4;
          }
          img {
            width: 95px;
            height: 95px;
          }
          .info {
            padding-left: 10px;
            line-height: 24px;
            width: 190px;
            .name {
              font-size: 16px;
              color: #666;
            }
            .desc {
              color: #999;
            }
            .price {
              font-size: 22px;
              color: @priceColor;
              i {
                font-size: 16px;
              }
            }
          }
        }
      }
      li.brand {
        height: 180px;
        a {
          align-items: flex-start;
          img {
            width: 120px;
            height: 160px;
          }
          .info {
            p {
              margin-top: 8px;
            }
            .place {
              color: #999;
            }
          }
        }
      }
    }
  }
  &:hover {
    .layer {
      display: block;
    }
  }
  .xtx-skeleton {
    animation: fade 1s linear infinite alternate;
  }
  @keyframes fade {
    from {
      opacity: 0.2;
    }
    to {
      opacity: 1;
    }
  }
}
</style>
